---
title: "Clean Truck Check Testers in Sonoma County, CA (28)"
description: "28 CARB-credentialed Clean Truck Check testers in Sonoma County, California, across 6 cities. 19 offer mobile testing. Search by city, see phone numbers and…"
url: "https://ctcfinder.com/testers/sonoma-county/"
updated: "2026-11-01"
publisher: "CTC Finder (independent directory, not affiliated with CARB)"
---

# Clean Truck Check testers in Sonoma County, California

28 testing businesses in 6 cities; 19 offer mobile testing, 14 do smoke opacity tests, 21 test motorhomes.

> CTC Finder is an independent directory, not affiliated with CARB. Tester data: CARB Clean Truck Check public tester list, last checked November 1, 2026. Confirm services, hours and prices with the tester.

## City pages

- [Santa Rosa](https://ctcfinder.com/testers/sonoma-county/santa-rosa/) — 17 listings
- [Sonoma](https://ctcfinder.com/testers/sonoma-county/sonoma/) — 5 listings

## Cazadero

- **[Performance Pemf](https://ctcfinder.com/tester/performance-pemf-cazadero/)** — 1100 Old Duncans Grade Rd, Cazadero, CA 95421 — (707) 480-1646. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.

## Cotati

- **[CalFleet](https://ctcfinder.com/tester/calfleet-cotati/)** — 7911 Redwood Dr Suite 131, Cotati, CA 94931 — (707) 665-5710. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Alpha Fleet Solutions LLC](https://ctcfinder.com/tester/alpha-fleet-solutions-llc-cotati/)** — 141 Helman Ln, Cotati, CA 94931 — (707) 971-0514. Services: mobile testing, OBD testing, motorhome testing.

## Healdsburg

- **[Opperman & Sons, Inc.](https://ctcfinder.com/tester/opperman-and-sons-inc-healdsburg/)** — 280 Kinley Dr, Healdsburg, CA 95448 — (707) 478-7491. Services: OBD testing.
- **[Opperman and Son](https://ctcfinder.com/tester/opperman-and-son-healdsburg/)** — Healdsburg, CA 95448 — (707) 304-0375. Services: OBD testing.

## Sebastopol

- **[Dylan Enochs](https://ctcfinder.com/tester/dylan-enochs-sebastopol/)** — Sebastopol, CA 95472 — (707) 322-5475. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.


## Frequently asked questions

### How many Clean Truck Check testers are in Sonoma County?

CTC Finder lists 28 testing businesses in Sonoma County from CARB's public tester list (34 credentialed testers), last checked November 1, 2026. Listing on CARB's list is optional, so the real number can be higher.

### Is there mobile Clean Truck Check testing in Sonoma County?

Yes. 19 listed businesses in Sonoma County offer mobile testing, which means the tester comes to your yard. Use the Mobile filter above to see them.

### How much does a Clean Truck Check test cost in Sonoma County?

Testers set their own prices. Published prices for an OBD test are usually $50–$135 per vehicle; smoke opacity tests for older trucks often cost more, and mobile testers may add a trip fee. See the [cost guide](https://ctcfinder.com/guide/cost/).